Hollis M1 Frameless Scuba Diving Freediving/Spearfishing Dive Mask

Our review of the Hollis M1 finds it best suited to divers and snorkelers who prioritize underwater visibility and a comfortable, low-profile fit. The single biggest reason to consider this mask is its extra clear glass lens, which delivers noticeably better color fidelity and light transmission than typical masks, improving visibility in low light conditions. Reviewers repeatedly note that the distortion-free optics and wide field of view make the M1 a strong choice for freediving, spearfishing, and recreational scuba where seeing detail and color matters.

Key Features

• Ultra clear glass: The low-iron lens reduces green tint and increases light transmittance for truer colors and improved visibility in dim underwater environments.
• Distortion-free optics: The lens construction minimizes distortion so objects remain sharp across the field of view, helpful for spotting fish and hazards at depth.
• Frameless design: The low-profile frameless skirt sits close to the face to reduce bulk and make the mask easy to pack and fit under hoods or helmets.
• 100% silicone skirt: The soft pure silicone provides a comfortable seal against the face and wraps around nose and forehead for a secure fit.
• Quality buckles and strap: Simple, durable buckles and an easy-adjust strap make the mask quick to don and remove between dives or during surface swims.
• Reliable brand engineering: Hollis focuses on technical diving solutions, so the M1 reflects practical design choices for demanding underwater use.

Who It's For

The M1 is aimed at freedivers, spearfishers, and scuba divers who value optical clarity and a compact, comfortable mask that performs well in low light. It works particularly well for divers who want accurate color rendition to identify fish and underwater features, and for those who prefer a frameless, low-volume profile for equalization and packing.

Those who need prescription lenses, an extremely wide panoramic view for photo or video work, or who have consistent problems with fogging despite anti-fog routines may want to evaluate alternatives. The M1 is versatile, but opinions vary on seal performance for faces with heavy facial hair, so cautious buyers should check fit before committing.

Pros & Cons

Pros

• Excellent optical clarity from the extra clear glass for better color and low-light visibility.
• Comfortable 100% silicone skirt that conforms to a wide range of face shapes, including larger noses.
• Low-profile frameless design and reliable buckles make it easy to pack and quick to put on or remove.
• Well-built for the price, offering good value for divers focused on visibility and fit.

Cons

• Seal performance and fogging experiences vary among users, so results depend on individual face shape and anti-fog care.
• Not specified for prescription lens insert options, so divers needing corrective lenses may need alternatives.

Specifications

Product	Hollis M1 Frameless Dive Mask
Lens type	Extra clear glass (low iron)
Skirt material	100% pure silicone
Design	Frameless, low-volume
Strap and buckles	Quality quick-adjust strap and buckles
Intended use	Scuba diving, freediving, snorkeling, spearfishing

Our Verdict

The Hollis M1 is a solid choice for divers who put visibility and a comfortable low-volume fit first; its extra clear glass lens noticeably improves color and clarity in low light while the pure silicone skirt fits a wide range of faces. Given its build quality and practical features like easy-adjust buckles, it offers good value for freedivers, spearfishers, and recreational scuba users who prioritize optical performance.

Frequently Asked Questions

Does the M1 fog easily?
Fogging varies by user and maintenance; many find it manageable with standard anti-fog treatment, while a few report occasional fogging depending on fit and breath control.

Will the mask fit larger noses?
Yes, customers report the frameless skirt and shape accommodate a wide range of face shapes, including those with larger noses.

Is the lens good for low light diving?
The extra clear, low-iron glass improves light transmittance and reduces green tint, making it better than typical glass for low light underwater visibility.